Question

why do firms internalize a competitive advantage

Answer 1

They always need to be so good.

Answer 2

There are many valuable reasons to internalize the business.

The main benefit of implementing this strategy is that it provides a competitive benefit to your company in this global market.  

It let firms to enjoy better access to many new markets and even customers for both existing services and products.

Along with this, the capital amount is derived from international market penetration.